Neutrino series bags are very warm for their weight, or light for their warmth. The down is treated to repel water - quality down bags don'w flatten in damp conditions like they used to. Chevron baffles reduce down migration inside them. - L size: suitable for max. 200 cm users - Circumference at shoulders: 162 cm - Tapered mummy shape for minimal weight penalties - Insulated with fill power 800 goose down with RDS certificate - Top quality 20 denier Pertex Quantum surface fabric allows the down to do its job, 38g/m² - Surface and liner fabrics made of recycled fiber - Down-filled thermal collar - 3/4 length main zipper - Waterproof stuffsack and cotton storage sack for home storage The surface fabric has been treated to repel water, without use of PFC. The choice between left/right tells which side the zipper is on. Most right-handed users choose a bag with a left zipper and vice versa.